Log in

Relevant bibliographies by topics / RG-flow / Journal articles

To see the other types of publications on this topic, follow the link: RG-flow.

Journal articles on the topic 'RG-flow'

Author: Grafiati

Published: 4 June 2021

Last updated: 11 March 2023

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'RG-flow.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

LEE, BUM-HOON, SHESANSU SEKHAR PAL, and SANG-JIN SIN. "RG FLOW OF TRANSPORT QUANTITIES." International Journal of Modern Physics A 27, no. 13 (May 16, 2012): 1250071. http://dx.doi.org/10.1142/s0217751x12500716.

Full text

Abstract:

The RG flow equation of various transport quantities are studied in arbitrary space–time dimensions, in the fixed as well as fluctuating background geometry both for the Maxwellian and DBI type of actions. The regularity condition on the flow equation of the conductivity at the horizon for the DBI action reproduces naturally the leading order result of Hartnoll et al. [J. High Energy Phys. 04, 120 (2010)]. Motivated by the result of van der Marel et al. [Science 425, 271 (2003], we studied, analytically, the conductivity versus frequency plane by dividing it into three distinct parts: ω < T, ω > T and ω ≫ T. In order to compare, we choose (3+1)-dimensional bulk space–time for the computation of the conductivity. In the ω < T range, the conductivity does not show up the Drude like form in any space–time dimensions. In the ω > T range and staying away from the horizon, for the DBI action with unit dynamical exponent, nonzero magnetic field and charge density, the conductivity goes as ω-2/3, whereas the phase of the conductivity, goes as, arctan ( Im σxx/ Re σxx) = π/6 and arctan ( Im σxy/ Re σxy) = -π/3. There exists a universal quantity at the horizon that is the phase angle of conductivity, which either vanishes or an integral multiple of π. Furthermore, we calculate the temperature dependence to the thermoelectric and the thermal conductivity at the horizon. The charge diffusion constant for the DBI action is studied.

APA, Harvard, Vancouver, ISO, and other styles

2

Hesamifard, F., and M. M. Rezaii. "Evolution of the Robertson–Walker metric under 2-loop renormalization group flow." International Journal of Modern Physics D 26, no. 03 (February 3, 2017): 1750021. http://dx.doi.org/10.1142/s0218271817500213.

Full text

Abstract:

Here, we study the evolution of a Robertson–Walker (RW) metric under the Ricci flow and 2-loop renormalization group flow (RG-2 flow). We show that a RW metric is a fixed point of the Ricci flow and it is not a solution of the RG-2 flow. RG-2 flow is considered on a doubly twisted product metric with further assumptions and also we introduce a necessary condition for existence of the solution of RG-2 flow.

APA, Harvard, Vancouver, ISO, and other styles

3

Hassler, Falk. "RG flow of integrable E-models." Physics Letters B 818 (July 2021): 136367. http://dx.doi.org/10.1016/j.physletb.2021.136367.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Lasso Andino, Óscar. "RG-2 flow, mass and entropy." Classical and Quantum Gravity 36, no. 6 (February 26, 2019): 065011. http://dx.doi.org/10.1088/1361-6382/ab05f6.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

IGARASHI, Y., K. ITOH, and H. SO. "EXACT SYMMETRIES REALIZED ON THE RG FLOW." International Journal of Modern Physics A 16, no. 11 (April 30, 2001): 2047–51. http://dx.doi.org/10.1142/s0217751x01004682.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Mukhopadhyay, Ayan. "Understanding the holographic principle via RG flow." International Journal of Modern Physics A 31, no. 34 (December 6, 2016): 1630059. http://dx.doi.org/10.1142/s0217751x16300593.

Full text

Abstract:

This is a review of some recent works which demonstrate how the classical equations of gravity in AdS themselves hold the key to understand their holographic origin in the form of a strongly coupled large N QFT whose algebra of local operators can be generated by a few (single-trace) elements. I discuss how this can be realized by reformulating Einstein’s equations in AdS in the form of a nonperturbative RG flow that further leads to a new approach toward constructing strongly interacting QFTs. In particular, the RG flow can self-determine the UV data that are otherwise obtained by solving classical gravity equations and demanding that the solutions do not have naked singularities. For a concrete demonstration, I focus on the hydrodynamic limit in which case this RG flow connects the AdS/CFT correspondence with the membrane paradigm, and also reproduces the known values of the dual QFT transport coefficients.

APA, Harvard, Vancouver, ISO, and other styles

7

Bazeia, Dionisio, Francisco A. Brito, and Laercio Losano. "Scalar fields, bent branes, and RG flow." Journal of High Energy Physics 2006, no. 11 (November 23, 2006): 064. http://dx.doi.org/10.1088/1126-6708/2006/11/064.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Verlinde, Erik, and Herman Verlinde. "RG-flow, gravity and the cosmological constant." Journal of High Energy Physics 2000, no. 05 (May 18, 2000): 034. http://dx.doi.org/10.1088/1126-6708/2000/05/034.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Bianchi, Massimo, Daniel Z. Freedman, and Kostas Skenderis. "How to go with an RG flow." Journal of High Energy Physics 2001, no. 08 (August 17, 2001): 041. http://dx.doi.org/10.1088/1126-6708/2001/08/041.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Morales, Jose F., and Mario Trigiante. "Walls from fluxes: an analytic RG-flow." Journal of High Energy Physics 2002, no. 02 (February 15, 2002): 018. http://dx.doi.org/10.1088/1126-6708/2002/02/018.

Full text

APA, Harvard, Vancouver, ISO, and other styles

11

Kastor, D. A., E. J. Martinec, and S. H. Shenker. "RG flow in N = 1 discrete series." Nuclear Physics B 316, no. 3 (April 1989): 590–608. http://dx.doi.org/10.1016/0550-3213(89)90060-6.

Full text

APA, Harvard, Vancouver, ISO, and other styles

12

Prudêncio, Thiago. "Cutoff-independent RG flow equations for two-coupled chains model." Modern Physics Letters B 28, no. 32 (December 30, 2014): 1450247. http://dx.doi.org/10.1142/s0217984914502479.

Full text

Abstract:

One-dimensional strongly correlated electron systems coupled via transverse hopping and presence of interband interactions can converge to a Luttinger liquid state or diverge to an even more intricate behavior, as a Mott state. Explicit consideration of the renormalization group (RG) flow of the Fermi points in the Fermi surface, turns the classification of phase transitions more challenging. We reconsider the recent paper for the spinless case [E. Correa and A. Ferraz, Eur. Phys. J. B 87 (2014) 51], where RG flow equations are derived in a cutoff-dependent form up to two-loops order. We demonstrate that the cutoff-dependence can be removed by rewriting the RG flow equations in terms of the energy scale variable. In our paper, the RG flow equations assume a cutoff-independent form and leads to fixed points independent of cutoff choice. The consequence is the invariance under cutoff transformations, more suitable for classifying universality classes and phase transitions.

APA, Harvard, Vancouver, ISO, and other styles

13

Vacca, Gian Paolo. "Wilsonian renormalization group in the functional non-perturbative approach." International Journal of Geometric Methods in Modern Physics 17, supp01 (March 5, 2020): 2040001. http://dx.doi.org/10.1142/s0219887820400010.

Full text

Abstract:

We consider a functional relation between a given Wilsonian renormalization group (RG) flow, which has to be related to a specific coarse-graining procedure, and an infinite family of (UV cutoff) scale-dependent field redefinitions. Within this framework, one can define a family of Wilsonian proper-time (PT) exact RG equations associated to an arbitrary regulator function. New applications of these RG flow schemes to the Ising Universality class in three dimensions in the derivative expansion are shortly illustrated.

APA, Harvard, Vancouver, ISO, and other styles

14

Bahr, Benjamin, and Klaus Liegener. "Towards exploring features of Hamiltonian renormalisation relevant for quantum gravity." Classical and Quantum Gravity 39, no. 7 (March 7, 2022): 075010. http://dx.doi.org/10.1088/1361-6382/ac5050.

Full text

Abstract:

Abstract We consider the Hamiltonian renormalisation group (RG) flow of discretised one-dimensional physical theories. In particular, we investigate the influence the choice of different embedding maps has on the RG flow and the resulting continuum limit, and show in which sense they are, and in which sense they are not equivalent as physical theories. We are furthermore elucidating on the interplay of the RG flow and the algebras which operators satisfy, both on the discrete and the continuum. Further, we propose preferred renormalisation prescriptions for operator algebras guaranteeing to arrive at preferred algebraic relations in the continuum, if suitable extension properties are assumed. Finally, we introduce a weaker form of distributional equivalence, and show how unitarily inequivalent continuum limits, which arise due to a choice of different embedding maps, can still be weakly equivalent in that sense. We expect these results to have application in defining an RG flow in loop quantum gravity.

APA, Harvard, Vancouver, ISO, and other styles

15

Lang, C. H., J. A. Obih, G. J. Bagby, J. N. Bagwell, and J. J. Spitzer. "Endotoxin-induced increases in regional glucose utilization by small intestine: a TNF-independent effect." American Journal of Physiology-Gastrointestinal and Liver Physiology 260, no. 4 (April 1, 1991): G548—G555. http://dx.doi.org/10.1152/ajpgi.1991.260.4.g548.

Full text

Abstract:

The purpose of the present study was to determine whether the lipopolysaccharide (LPS)-induced increase in glucose uptake was a generalized response along the length of the entire gastrointestinal (GI) tract and to assess the relative contributions of the mucosa and muscularis. The putative roles of tumor necrosis factor (TNF) and blood flow in the metabolic response of the intestine to LPS were also examined. In vivo glucose uptake (Rg) was determined for various segments of the GI tract under basal postabsorptive conditions and 3 h after intravenous injection of Escherichia coli LPS using 2-[14C]deoxyglucose. At this time, LPS-treated rats were euglycemic, and Rg was elevated in all sections of the GI tract (52-96%). In control animals, mucosal Rg accounted for 79% of the glucose uptake by the entire small intestine; LPS increased Rg in both the mucosa and muscularis and did not alter this relationship. The LPS-induced increase in intestinal Rg was not attenuated by pretreatment with TNF antibody. Cardiac output (CO) and intestinal blood flow, assessed using radiolabeled microspheres, were not different from control values 3 h after LPS. Blood flow to the muscularis was increased (120%) in all sections of the small intestine from LPS-treated rats. These results indicate that 3 h after a low dose of LPS, glucose uptake by the entire length of the GI tract was elevated, and the majority of increase was due to enhanced uptake by the mucosa, which was blood flow independent. Furthermore, the increased Rg was not dependent on elevations in plasma glucose, insulin, or TNF levels. However, an increased blood flow to the muscularis was associated with an elevated Rg in that region.

APA, Harvard, Vancouver, ISO, and other styles

16

James, D. E., K. M. Burleigh, L. H. Storlien, S. P. Bennett, and E. W. Kraegen. "Heterogeneity of insulin action in muscle: influence of blood flow." American Journal of Physiology-Endocrinology and Metabolism 251, no. 4 (October 1, 1986): E422—E430. http://dx.doi.org/10.1152/ajpendo.1986.251.4.e422.

Full text

Abstract:

The influence of blood flow (BF) and basal neuromotor tone on in vivo insulin-stimulated glucose uptake (Rg') in muscle was examined using the euglycemic clamp plus deoxyglucose/glucose tracer (insulin action) and labeled microsphere (BF) techniques. Anesthesia was used to produce perturbations in BF and/or activity compared with conscious rats. An index of muscle glycolytic flux (Gf) was estimated from Rg' in excess of glycogen synthesis. Gf and glycogen synthesis were significantly increased in soleus and red gastrocnemius (RG) during insulin infusion (150 mU/l) in conscious rats. Rg' was related to muscle BF in conscious rats (r = 0.92). In anesthetized rats, Rg' and BF were reduced in soleus, RG, red quadriceps, and plantaris (e.g., soleus 69%, P less than 0.001, and 80%, P less than 0.001, respectively). However, it is unlikely that Rg' and BF are causally related because fractional extraction of glucose by muscle was low (approximately 9%); fractional extraction increased during anesthesia (17%, P less than 0.01); BF but not Rg' was reduced by anesthesia in extensor digitorum longus, white gastrocnemius, and white quadriceps; and reduced Rg' during anesthesia in soleus and RG was mainly due to reduced GF. In conclusion, BF is not a major contributor to the heterogeneity in insulin-stimulated glucose uptake among individual muscles under basal conditions. These data suggest that neuromotor tone may indirectly influence the magnitude of muscle glucose uptake during insulin elevation via a substrate switching effect. This may give rise to a significant increase in glycolytic flux of glucose in those muscles that exhibit elevated activity even at rest (e.g., soleus).(ABSTRACT TRUNCATED AT 250 WORDS)

APA, Harvard, Vancouver, ISO, and other styles

17

Andino, Oscar Lasso. "RG-2 flow and black hole entanglement entropy." Classical and Quantum Gravity 38, no. 8 (March 30, 2021): 085019. http://dx.doi.org/10.1088/1361-6382/abed5f.

Full text

APA, Harvard, Vancouver, ISO, and other styles

18

Golubtsova, Anastasia. "Holographic RG flow at zero and finite temperatures." EPJ Web of Conferences 191 (2018): 05012. http://dx.doi.org/10.1051/epjconf/201819105012.

Full text

Abstract:

We consider a 5d holographic model with a dilaton potential representing a sum of exponential functions. We construct Poincaré invatiant and black brane solutions with AdS and non-AdS boundaries. Under the holographic duality these solutions can be interpreted as RG flows. We discuss the dependence of the running coupling on the energy through the constructed solutions.

APA, Harvard, Vancouver, ISO, and other styles

19

Li, Miao, and Feng-Li Lin. "Note on holographic RG flow in string cosmology." Classical and Quantum Gravity 19, no. 12 (May 31, 2002): 3281–92. http://dx.doi.org/10.1088/0264-9381/19/12/311.

Full text

APA, Harvard, Vancouver, ISO, and other styles

20

Yamaguchi, Satoshi. "Holographic RG Flow on the Defect andg-Theorem." Journal of High Energy Physics 2002, no. 10 (October 1, 2002): 002. http://dx.doi.org/10.1088/1126-6708/2002/10/002.

Full text

APA, Harvard, Vancouver, ISO, and other styles

21

Gutperle, Michael, Matthew Headrick, Shiraz Minwalla, and Volker Schomerus. "Spacetime Energy Decreases under World-sheet RG Flow." Journal of High Energy Physics 2003, no. 01 (January 30, 2003): 073. http://dx.doi.org/10.1088/1126-6708/2003/01/073.

Full text

APA, Harvard, Vancouver, ISO, and other styles

22

Green, Daniel, Michael Mulligan, and David Starr. "Boundary entropy can increase under bulk RG flow." Nuclear Physics B 798, no. 3 (August 2008): 491–504. http://dx.doi.org/10.1016/j.nuclphysb.2008.01.010.

Full text

APA, Harvard, Vancouver, ISO, and other styles

23

Carfora, Mauro, and Christine Guenther. "Scaling and Entropy for the RG-2 Flow." Communications in Mathematical Physics 378, no. 1 (June 5, 2020): 369–99. http://dx.doi.org/10.1007/s00220-020-03778-1.

Full text

APA, Harvard, Vancouver, ISO, and other styles

24

Moss de Oliveira, S., P. M. C. de Oliveira, and F. C. de Sá Barreto. "The spin-S Blume-Capel RG flow diagram." Journal of Statistical Physics 78, no. 5-6 (March 1995): 1619–27. http://dx.doi.org/10.1007/bf02180146.

Full text

APA, Harvard, Vancouver, ISO, and other styles

25

Angelantonj, Carlo, and Adi Armoni. "RG flow, Wilson loops and the dilaton tadpole." Physics Letters B 482, no. 1-3 (June 2000): 329–36. http://dx.doi.org/10.1016/s0370-2693(00)00475-5.

Full text

APA, Harvard, Vancouver, ISO, and other styles

26

Arutyunov, G., S. Frolov, and S. Theisen. "Gravity-scalar fluctuations in holographic RG flow geometries." Physics Letters B 484, no. 3-4 (July 2000): 295–305. http://dx.doi.org/10.1016/s0370-2693(00)00665-1.

Full text

APA, Harvard, Vancouver, ISO, and other styles

27

Kiritsis, E., W. Li, and F. Nitti. "Holographic RG flow and the quantum effective action." Fortschritte der Physik 62, no. 5-6 (April 22, 2014): 389–454. http://dx.doi.org/10.1002/prop.201400007.

Full text

APA, Harvard, Vancouver, ISO, and other styles

28

Woolgar, E. "Some applications of Ricci flow in physics." Canadian Journal of Physics 86, no. 4 (April 1, 2008): 645–51. http://dx.doi.org/10.1139/p07-146.

Full text

Abstract:

I discuss certain applications of the Ricci flow in physics. I first review how it arises in the renormalization group (RG) flow of a nonlinear sigma model. I then review the concept of a Ricci soliton and recall how a soliton was used to discuss the RG flow of mass in two dimensions. I then present recent results obtained with Oliynyk on the flow of mass in higher dimensions. The final section discusses how Ricci flow may arise in general relativity, particularly for static metrics.PACS Nos.: 02.40Ky, 02.30Ik, 04.20.–q

APA, Harvard, Vancouver, ISO, and other styles

29

Willoughby, H. E. "The Golden Radius in Balanced Atmospheric Flows." Monthly Weather Review 139, no. 4 (April 1, 2011): 1164–68. http://dx.doi.org/10.1175/2010mwr3579.1.

Full text

Abstract:

Abstract In gradient-balanced, cyclonic flow around low pressure systems, a golden radius exists where RG, the gradient-wind Rossby number, is φ−1 = 0.618 034, the inverse golden ratio. There, the geostrophic, cyclostrophic, and inertia-circle approximations to the wind all produce equal magnitudes. The ratio of the gradient wind to any of these approximations is φ−1. In anomalous (anticyclonic) flow around a low, the golden radius falls where RG = −φ = −1.618 034, and the magnitude of the ratio of the anomalous wind to any of the two-term approximations is φ. In normal flow, the golden radius marks the transition between more-nearly cyclostrophic and more-nearly geostrophic regimes. In anomalous flow, it marks the transition between more-nearly cyclostrophic (anticyclonic) and inertia-circle regimes. Over a large neighborhood surrounding the golden radius, averages of the geostrophic and cyclostrophic winds weighted as φ−2 and φ−3 are good approximations to the gradient wind. In high pressure systems Rg, the geostrophic Rossby number, must be in the range 0 > Rg ≥ −¼, and the pressure gradient cannot produce inward centripetal accelerations. An analogous radius where Rg = −φ−3 plays a role somewhat like that of the golden radius, but it is much less interesting.

APA, Harvard, Vancouver, ISO, and other styles

30

Gegenberg, Jack, and Vardarajan Suneeta. "The fixed points of RG flow with a tachyon." Journal of High Energy Physics 2006, no. 09 (September 18, 2006): 045. http://dx.doi.org/10.1088/1126-6708/2006/09/045.

Full text

APA, Harvard, Vancouver, ISO, and other styles

31

Petkou, Anastasios C., and George Siopsis. "Stationary RG flow and thermodynamics of conformal field theories." Journal of High Energy Physics 2000, no. 02 (February 2, 2000): 002. http://dx.doi.org/10.1088/1126-6708/2000/02/002.

Full text

APA, Harvard, Vancouver, ISO, and other styles

32

Klebanov, Igor R., and Nikita A. Nekrasov. "Gravity duals of fractional branes and logarithmic RG flow." Nuclear Physics B 574, no. 1-2 (May 2000): 263–74. http://dx.doi.org/10.1016/s0550-3213(00)00016-x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

33

Evans, Nick, and Michela Petrini. "AdS RG-flow and the super-Yang–Mills cascade." Nuclear Physics B 592, no. 1-2 (January 2001): 129–42. http://dx.doi.org/10.1016/s0550-3213(00)00593-9.

Full text

APA, Harvard, Vancouver, ISO, and other styles

34

Fateev, Vladimir A., and Sergei L. Lukyanov. "Boundary RG flow associated with the AKNS soliton hierarchy." Journal of Physics A: Mathematical and General 39, no. 41 (September 27, 2006): 12889–925. http://dx.doi.org/10.1088/0305-4470/39/41/s10.

Full text

APA, Harvard, Vancouver, ISO, and other styles

35

Lang, C. H., M. Ajmal, and A. G. Baillie. "Neural control of glucose uptake by skeletal muscle after central administration of NMDA." American Journal of Physiology-Regulatory, Integrative and Comparative Physiology 268, no. 2 (February 1, 1995): R492—R497. http://dx.doi.org/10.1152/ajpregu.1995.268.2.r492.

Full text

Abstract:

Intracerebroventricular injection of N-methyl-D-aspartate (NMDA) produces hyperglycemia and increases whole body glucose uptake. The purpose of the present study was to determine in rats which tissues are responsible for the elevated rate of glucose disposal. NMDA was injected intracerebroventricularly, and the glucose metabolic rate (Rg) was determined for individual tissues 20-60 min later using 2-deoxy-D-[U-14C]glucose. NMDA decreased Rg in skin, ileum, lung, and liver (30-35%) compared with time-matched control animals. In contrast, Rg in skeletal muscle and heart was increased 150-160%. This increased Rg was not due to an elevation in plasma insulin concentrations. In subsequent studies, the sciatic nerve in one leg was cut 4 h before injection of NMDA. NMDA increased Rg in the gastrocnemius (149%) and soleus (220%) in the innervated leg. However, Rg was not increased after NMDA in contralateral muscles from the denervated limb. Data from a third series of experiments indicated that the NMDA-induced increase in Rg by innervated muscle and its abolition in the denervated muscle were not due to changes in muscle blood flow. The results of the present study indicate that 1) central administration of NMDA increases whole body glucose uptake by preferentially stimulating glucose uptake by skeletal muscle, and 2) the enhanced glucose uptake by muscle is neurally mediated and independent of changes in either the plasma insulin concentration or regional blood flow.

APA, Harvard, Vancouver, ISO, and other styles

36

Dütsch, Michael. "Massive vector bosons: Is the geometrical interpretation as a spontaneously broken gauge theory possible at all scales?" Reviews in Mathematical Physics 27, no. 10 (November 2015): 1550024. http://dx.doi.org/10.1142/s0129055x15500245.

Full text

Abstract:

The usual derivation of the Lagrangian of a model for massive vector bosons, by spontaneous symmetry breaking of a gauge theory, implies that the prefactors of the various interaction terms are uniquely determined functions of the coupling constant(s) and the masses. Since, under the renormalization group (RG) flow, different interaction terms get different loop-corrections, it is uncertain whether these functions remain fixed under this flow. We investigate this question for the [Formula: see text]-Higgs-model to 1-loop order in the framework of Epstein–Glaser renormalization. Our main result reads: choosing the renormalization mass scale(s) in a way corresponding to the minimal subtraction scheme, the geometrical interpretation as a spontaneously broken gauge theory gets lost under the RG-flow. This holds also for the clearly stronger property of BRST-invariance of the Lagrangian. On the other hand, we prove that physical consistency, which is a weak form of BRST-invariance of the time-ordered products, is maintained under the RG-flow.

APA, Harvard, Vancouver, ISO, and other styles

37

PALHARES, LETÍCIA F., and EDUARDO S. FRAGA. "RENORMALIZATION GROUP FLOW IN COLD AND DENSE YUKAWA THEORY." International Journal of Modern Physics E 16, no. 09 (October 2007): 2806–9. http://dx.doi.org/10.1142/s0218301307008458.

Full text

Abstract:

We analyze the role of renormalization group (RG) running of the coupling and fermion masses in perturbative Yukawa theory at finite density. The dependence of the RG flow on the number of fermion flavors is discussed. Results for the fermionic contribution to the two-loop pressure at zero temperature and finite density are presented for NF = 4, and finite fermion mass effects are shown to be an important correction.

APA, Harvard, Vancouver, ISO, and other styles

38

Péli, Z., S. Nagy, and K. Sailer. "Phase structure of the Euclidean three-dimensional O(1) ghost model." International Journal of Modern Physics A 34, no. 02 (January 20, 2019): 1950021. http://dx.doi.org/10.1142/s0217751x19500210.

Full text

Abstract:

We have treated the Euclidean three-dimensional O(1) ghost model with a modified version of the effective average action (EAA) renormalization group (RG) method, developed by us. We call it Fourier–Wetterich RG approach and it is used to investigate the occurrence of a periodic condensate in terms of the functional RG. The modification involves additional terms in the ansatz of the EAA, corresponding to the Fourier-modes of the periodic condensate. The RG flow equations are derived keeping the terms up to the fourth order of the gradient expansion (GE), however the numerical calculations are conducted in the second order (or next-to-leading order, NLO) of the GE. The expansion of the flow equations around the nontrivial minimum of the local potential takes into account properly the vertices induced by the periodic condensate even if the wave function renormalization is set to be field-independent. The numerical analysis reveals several different phases with three multicritical points.

APA, Harvard, Vancouver, ISO, and other styles

39

Márián, I. G., U. D. Jentschura, N. Defenu, A. Trombettoni, and I. Nándori. "Vacuum energy and renormalization of the field-independent term." Journal of Cosmology and Astroparticle Physics 2022, no. 03 (March 1, 2022): 062. http://dx.doi.org/10.1088/1475-7516/2022/03/062.

Full text

Abstract:

Abstract Due to its construction, the nonperturbative renormalization group (RG) evolution of the constant, field-independent term (which is constant with respect to field variations but depends on the RG scale k) requires special care within the Functional Renormalization Group (FRG) approach. In several instances, the constant term of the potential has no physical meaning. However, there are special cases where it receives important applications. In low dimensions (d = 1), in a quantum mechanical model, this term is associated with the ground-state energy of the anharmonic oscillator. In higher dimensions (d = 4), it is identical to the Λ term of the Einstein equations and it plays a role in cosmic inflation. Thus, in statistical field theory, in flat space, the constant term could be associated with the free energy, while in curved space, it could be naturally associated with the cosmological constant. It is known that one has to use a subtraction method for the quantum anharmonic oscillator in d = 1 to remove the k 2 term that appears in the RG flow in its high-energy (UV) limit in order to recover the correct results for the ground-state energy. The subtraction is needed because the Gaussian fixed point is missing in the RG flow once the constant term is included. However, if the Gaussian fixed point is there, no further subtraction is required. Here, we propose a subtraction method for k 4 and k 2 terms of the UV scaling of the RG equations for d = 4 dimensions if the Gaussian fixed point is missing in the RG flow with the constant term. Finally, comments on the application of our results to cosmological models are provided.

APA, Harvard, Vancouver, ISO, and other styles

40

Hornick, J. L., C. Van Eenaeme, S. Gauthier, P. Baldwin, and L. Istasse. "Glucose, alpha-amino nitrogen, and amino acid exchange across the hindlimb in young double-muscled type bulls maintained at two growth rates." Canadian Journal of Animal Science 76, no. 2 (June 1, 1996): 193–202. http://dx.doi.org/10.4141/cjas96-030.

Full text

Abstract:

The effect of growth rate and protein supplementation on muscle metabolism of eight bulls from the Belgian Blue breed, double-muscled type, was investigated by the arterio-venous difference technique. A low growth (LG) group was maintained at a low growth rate over 36 d, and a rapid growth (RG) group for 28 d before receiving a fattening diet allowing for a rapid growth. At the end of the RG period the RG bulls received a supplement of protected soybean meal. Animals were fitted with an aortic ultrasonic blood flow probe and with catheters in the aorta and the vena cava. The blood flow in the hindlimbs of bulls varied greatly by time of the day but was higher in the RG group. The RG group had a higher arterio-venous difference (AVD) and uptake of alpha-amino nitrogen while AVD in essential amino acids was four times higher and uptake eight times higher. Significant higher AVD or uptake was observed in individual amino acids such as leucine, isoleucine and lysine. The supplementation with protected soybean meal had significant negative effect on the uptake of several amino acids. It was concluded that caution should be exercised when measuring punctually blood flow in muscle tissue, for example by dilution techniques. At high growth rate, the requirements for amino acids are larger than for glucose. Excess protein provides no additional benefit. Key words: Bull, hindlimb catheterism, growth rate, protected soy bean, metabolite

APA, Harvard, Vancouver, ISO, and other styles

41

KAUPUŽS, J. "A CRITICAL VIEW ON THE PERTURBATIVE RG METHOD." International Journal of Modern Physics A 27, no. 21 (August 20, 2012): 1250114. http://dx.doi.org/10.1142/s0217751x1250114x.

Full text

Abstract:

The perturbative renormalization group (RG) treatment of the Ginzburg–Landau model is reconsidered based on the Feynman diagram technique. We derive RG flow equations, exactly calculating all vertices appearing in the perturbative RG transformation of the φ4 model up to the ε3 order of the ε-expansion. The Fourier-transformed two-point correlation function G(k) has been considered. Although the ε-expansion of X(k) = 1/G(k) is well defined on the critical surface, we have revealed an inconsistency with the exact rescaling of X(k), represented as an expansion in powers of k at k →0. This new result can serve as a basis to challenge the correctness of the ε-expansion-based perturbative RG method.

APA, Harvard, Vancouver, ISO, and other styles

42

Chotigarpa, Rinrada, Kannika Na Lampang, Surachai Pikulkaew, Siriporn Okonogi, Kittisak Ajariyakhajorn, and Raktham Mektrirat. "Inhibitory Effects and Killing Kinetics of Lactic Acid Rice Gel Against Pathogenic Bacteria Causing Bovine Mastitis." Scientia Pharmaceutica 86, no. 3 (July 16, 2018): 29. http://dx.doi.org/10.3390/scipharm86030029.

Full text

Abstract:

Staphylococcus aureus and S. epidermidis are the major teat skin bacteria and lead to severe bovine mastitis. Teat antiseptic is an important tool for controlling intramammary infection. The antibacterial activity of lactic acid (LA) against one reference strain of S. aureus ATCC 25923 and two field strains including S. aureus and S. epidermidis was investigated using the broth microdilution method. Its minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) were 0.5% for strains belonging to both species. An antiseptic preparation containing 5% LA with modified rice gel (LA-RG) was successfully prepared. Rheological behavior of LA-RG was found to be a pseudoplastic flow with thixotropy with viscosity of approximately 0.007 Pas. LA-RG exhibited a sufficient adhesive property in the rolling ball test with a length of 9.67 ± 0.04 cm. Killing kinetic studies of LA-RG showed that the killing rate of LA-RG was significantly faster than that of LA. After 32 min of exposure to LA-RG, approximately 86% and 60% of S. aureus and S. epidermidis were reduced, respectively. Abnormal bacterial cell surface after exposure to LA-RG was observed by scanning electron microscopy. It is concluded that LA-RG is a promising preparation as an alternative product for preventing mastitis in dairy cattle.

APA, Harvard, Vancouver, ISO, and other styles

43

Cardoso, Gabriel Lopes, Gianguido Dall'Agata, and Dieter Lüst. "Curved BPS domain walls and RG flow in five dimensions." Journal of High Energy Physics 2002, no. 03 (March 20, 2002): 044. http://dx.doi.org/10.1088/1126-6708/2002/03/044.

Full text

APA, Harvard, Vancouver, ISO, and other styles

44

Berg, Marcus, and Henning Samtleben. "An Exact Holographic RG Flow Between 2d Conformal Fixed Points." Journal of High Energy Physics 2002, no. 05 (May 5, 2002): 006. http://dx.doi.org/10.1088/1126-6708/2002/05/006.

Full text

APA, Harvard, Vancouver, ISO, and other styles

45

Jack, I., and H. Osborn. "Constraints on RG flow for four dimensional quantum field theories." Nuclear Physics B 883 (June 2014): 425–500. http://dx.doi.org/10.1016/j.nuclphysb.2014.03.018.

Full text

APA, Harvard, Vancouver, ISO, and other styles

46

Branchina, Vincenzo, Krzysztof A. Meissner, and Gabriele Veneziano. "The price of an exact, gauge-invariant RG-flow equation." Physics Letters B 574, no. 3-4 (November 2003): 319–24. http://dx.doi.org/10.1016/j.physletb.2003.09.020.

Full text

APA, Harvard, Vancouver, ISO, and other styles

47

Schimmrigk, Rolf. "Heterotic RG flow fixed points with non-diagonal affine invariants." Physics Letters B 229, no. 3 (October 1989): 227–33. http://dx.doi.org/10.1016/0370-2693(89)91162-3.

Full text

APA, Harvard, Vancouver, ISO, and other styles

48

Ahn, Changhyun. "The eleven-dimensional uplift of four-dimensional supersymmetric RG flow." Journal of Geometry and Physics 62, no. 6 (June 2012): 1480–88. http://dx.doi.org/10.1016/j.geomphys.2012.02.007.

Full text

APA, Harvard, Vancouver, ISO, and other styles

49

Stephens, C. R. "Why Two Renormalization Groups are Better Than One." International Journal of Modern Physics B 12, no. 12n13 (May 30, 1998): 1379–96. http://dx.doi.org/10.1142/s0217979298000788.

Full text

Abstract:

The advantages of using more than one renormalization group (RG) in problems with more than one important length scale are discussed. It is shown that: i) using different RG's can lead to complementary information, i.e. what is very difficult to calculate with an RG based on one flow parameter may be much more accesible using another; ii) using more than one RG requires less physical input in order to describe via RG methods the theory as a function of its parameters; iii) using more than one RG allows one to describe problems with more than one diverging length scale. The above points are illustrated concretely in the context of both particle physics and statistical physics using the techniques of environmentally friendly renormalization. Specifically, finite temperature λφ4 theory, an Ising-type system in a film geometry, an Ising-type system in a transverse magnetic field, the QCD coupling constant at finite temperature and the crossover between bulk and surface critical behavior in a semi-infinite system are considered.

APA, Harvard, Vancouver, ISO, and other styles

50

HONERKAMP, CARSTEN. "FUNCTIONAL RENORMALIZATION GROUP IN THE 2D HUBBARD MODEL." International Journal of Modern Physics B 20, no. 19 (July 30, 2006): 2636–46. http://dx.doi.org/10.1142/s0217979206035114.

Full text

Abstract:

We review recent developments in functional renormalization group (RG) methods for interacting fermions. These approaches aim at obtaining an unbiased picture of competing Fermi liquid instabilities in the low-dimensional models like the two-dimensional Hubbard model. We discuss how these instabilities can be approached from various sides and how the fermionic RG flow can be continued into phases with broken symmetry.

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!